The oversized bird can be seen perched on a suitcase cart handle in photos posted on social media.

"I'm not kidding this woman is wrangling her peacock into the airport," said one woman shooting video. "Right now. Wrangling a peacock into the airport. Yep. That happens all the time."

She added, "what the hell, New York?

United Airlines spokeswoman Andrea Hiller said in a statement the "animal did not meet the guidelines for a number of reasons, including its weight and size. We explained this to the customer on three separate occasions before they arrived at the airport."

The airline also referred to federal Department of Transportation guidelines regarding “unusual animals,” which are evaluated on a "case-by-case basis."

The topic of emotional support animals on flights has come to the forefront in recent weeks.

Delta Airlines issued new regulations on emotional support and service animals on Jan. 19 requiring passengers who want to fly with animals must provide proof of their pet's training and vaccinations 48 hours before they board.

Delta will also require passengers who bring support animals to provide a document signed by a veterinarian or licensed mental health professional verifying that their animal can behave. The new regulations will take effect March 1.

United said it is reviewing its existing policy in an "effort to better balance protecting our employees and customers while accommodating passengers with disabilities."